I presume that is where the money is. Either independent contributors who make money as consultants, or a foundation that gets sponsoring, or a commercial comp

I presume that is where the money is. Either independent contributors who make money as consultants, or a foundation that gets sponsoring, or a commercial company behind the project: enterprise has the money. So inevitable, it will gravitaye towards more enterprisey features. I'm not saying that I have knowledge about what happens here with Nextcloud. But in FLOSS this has been seen often: from Drupal to LibreOffice: it moves away from 'consumers with simple needs' and towards 'heavy users'.